package com.sky.aspect;


import com.sky.anno.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.entity.Employee;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.time.LocalDateTime;

@Aspect
@Component
@Slf4j
public class AutoFillAspect {

    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.anno.AutoFill)")
    public void pointcut() {

    }

    @Before("pointcut()")
    public void before(JoinPoint joinPoint) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
        log.info("前置");

        //获取到当前被拦截方法上的数据库类型
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();//方法签名
        AutoFill autofill = signature.getMethod().getAnnotation(AutoFill.class);//获取注解
        OperationType operationType = autofill.value();//获得操作类型
        //获取方法参数
        Object[] args = joinPoint.getArgs();
        Object entity = args[0];
        //准备赋值数据
        LocalDateTime now = LocalDateTime.now();
        Long currentId = BaseContext.getCurrentId();

        //根据不同类型进行赋值
        if(operationType == OperationType.INSERT) {
            Method setCreateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
            Method setCreateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
            Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
            Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

//            Employee employee = new Employee();
//            employee.setCreateTime(now);
//            employee.setCreateUser(currentId);
//            employee.setUpdateTime(now);
//            employee.setUpdateUser(currentId);
            //通过反射为对象赋值
            setCreateTime.invoke(entity, now);
            setCreateUser.invoke(entity, currentId);
            setUpdateTime.invoke(entity, now);
            setUpdateUser.invoke(entity, currentId);

        }else if(operationType == OperationType.UPDATE) {
            Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
            Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

            //通过反射为对象赋值
            setUpdateTime.invoke(entity, now);
            setUpdateUser.invoke(entity, currentId);
        }

    }
}
